>> that's right. here's a copy of the civil suit that she filed here just yesterday. it was filed here at the contra costa superior court in martinez. in it, it claims that an entire school district was hiding sexual abuse. >> to me, it's like everything could have been stopped right then and there with that one letter. >> the letter kristen kanaan is talking about is a letter she claims remained hidden in a file at the school district for nearly 20 years. >> i'm writing to inform the administration of an incident that occurred in june of 1990. >> reporter: this letter is dated june 1994 and was allegedly sent to the school principal by an 18-year-old girl. in it, the woman documents alleged sexual abuse by a science teacher at joaquin middle school. >> on this day in june, however, when we arrived at my house, he stopped the car, kissed me on the mouth and placed his hand on my chest and inside my shirt. >> reporter: kristen was raped and stalked by her p.e. teacher in the mid '90s, who is now serving an eight-year sentence for the crime. she claims she was also touc